自攻螺丝自攻螺丝-扭力强度.VIP专享VIP免费

砂竄幅峙工2JtEt&+匕曲徑力債(4TorqueStrengthTorqueWrench(0~150kgf(150~750kgf購買(150~300kgfASMEB18.6.3/FIP1000/SAEJ78,J81,J1237,J933/ISO898-7,ISO2702/DIN7500-1/IFI-1132.TORSIONALSTRENGTHTEST扭力強度試驗FIP1000ApplicableTo:AllTappingScrews.適用範圍：所有種類的自攻螺絲TestPurpose:Todetectpartshavinglowstrengthwhichmighttwistoffduringdrivingorseating.測試目的：為檢查零件是否因為扭力不足而在組裝或旋緊時扭斷.Specification:Seechartsthatfollow.如下圖示Apparatusrequired:測試裝置A.AppropriateSplitCollet.適當的夾具B.ColletHolder.夾具座C.ScrewTestingFixture.螺絲測試座D.TorqueWrench;accuratewith+/-2%.準確度在2%以內的扭力扳手SampleSize(MinimumRecommen4epide:cesperlot;lotsizenottoexceed250,000抽樣數（建議最少：每批4支,每批批量不超過250MPCS.Procedure:測試程序A.Placethesplitcolletintothecolletholderandscrewthefastenerintothecolletsuchthataminimumof2fullthreadsareinthecolletandaminimumof2threadsareabovethecollet.將螺絲置入測試夾具中再將夾具放入夾具座,螺絲至少應有兩個完全牙在夾具中,兩牙在夾具上方.B.Placethecolletholderinthescrewtestingfixtureandclampintoplace.將夾具座固定在螺絲測試座上C.Applytorquewithatorquewrenchuntiltheparttwistsoff.扭轉扳手直到螺絲扭斷D.Recordfailurevalueandcomparetotherequiredspecification.記錄破壞值且與規範值比較Failure:Parttwistsintwoatlessthanspecifiedminimum.失效：螺絲扭斷值小於規範值PossibleFailureCauses:失效可能因素A.CoreHardnesstoolow.心部硬度太低B.CaseHardnesstoolow.表面硬度太低C.CaseHardnesstooshallow.有效滲碳層不足D.Minordiametertoosmall.最小徑(牙底徑太小ASMEB18・6・3一20134.11.3TorsionalStrengthTest.Screwsshallbesecurelyclampedbysuitablemeans,suchthattheclampedportionthreadsarenotdamagedandthatatleasttwofullthreadsprojectabovetheclampingdevice,andthatatleasttwofullthreadsexclusiveofpoint,flutes,orendslot,areheldwithintheclampingdevice.(Ablindholemaybeusedinplaceofathreadedclampingdevice,providedtheholedepthsissuchastoinsurethatbreakagewilloccurbeyondthepointorthefulllengthoftheflutesorendslot.Bymeansofasuitablycalibratedtorquemeasuringdevice,torqueshallbeappliedtothescrewuntilfailureoccurs.ThetorquerequiredtocausefailureshallnolessthantheminimumvaluegiveninTable50forthetypeandsizeofscrewbeingtested.AtypicalfixtureforconductingtorsionalstrengthtestsontappingscrewsisdepictedinFig.4.扭力強度測試：螺絲應以適當的方式安全的夾於一相配合的分離盲孔或其他裝置中以防止所夾緊的螺紋不致損毀，並且露出至少2全牙於夾具上至少2全牙（不包括尾端、割尾、或凹槽握於夾具之中。（盲孔可以取代螺紋夾具，其孔深應能保証螺絲不會在尾端、割尾全長或尖尾位置斷裂以一校正過且適當的扭力量測設備，測試直到斷裂為止，當斷裂時的扭力應不可小於表50之最小值。典型的扭力強度測試設備請參考圖4。圖4-扭力強度測試參考圖表50－自攻螺絲之扭力強度要求螺絲規格最小扭力強度,lb-in.TypeATypeAB,B,BF,BP,BTTypeC,D,F,G,TTypeTRS粗牙細牙粗牙細牙#244566#39991010#41213131514#51818182022#62424232724#73030…#83939424748#104856567465#1283889310893#14125…………1/4…142140179156#16152…………#18196…………5/16…290306370330#20250#244923/8…590560710600…747/16…620700820840…1/2…102010751285…1080ASMEB18.6.5M一20003.3TorsionalStrengthTestforAllTypesofScrew.Theshankofthesamplescrew(coatedoruncoated,asreceivedshallbesecurelyclampedinamating,split,blindholedie(seeFig.1,orotherequivalentmeans,suchthatthefollowingrequirementsaremet:所有類型之螺絲的扭力強度測試：將螺絲(接收時有塗層或無塗層)的桿部安全的夾在一個相配合的分離盲孔模具(參閱...